baber/WOPTO huggingface dataset:
Patent GB-493732-A (GB)
Title: Art of preparing viscose
IPC: D01F2/08
Filed: 1937-09-07
Abstract: Cellulose xanthate solution is obtained by treating cellulose fibre with a solution of an oxidant, continuing the treatment until the oxidant is consumed, then, in the presence of substantially all the oxidant reaction products, treating the fibre admixed with caustic soda solution in the form of an individualized fibre suspension with carbon bisulphide to form a cellulose xanthate solution.  All or most of the caustic soda required for the xanthation may be used in the pretreatment of the cellulose with the oxidant.  The solution viscosity of the cellulose is reduced by the oxidation treatment. Pulpboard chips produced from sulphite pulp may be mixed with caustic soda solution containing sodium hypochlorite and disintegrated to form a fibre suspension free from aggregates.  The mixture is preferably heated during formation of the suspension so as to assist the oxidation process.  When the hypochlorite has been consumed, the suspension is cooled and carbon bisulphide is added. Mixing is continued until a solution of cellulose xanthate is formed.  The solution may be diluted.  If desired, part only of the caustic soda is added with the oxidant, and the remainder in more concentrated form is added to the fibre suspension.  The xanthation step may be carried out in presence of a liquid such as acetone which is miscible with both the caustic soda solution and the carbon bisulphide. Instead of hypochlorite there may be used solutions of peroxides, perchlorates, or permanganates. Specifications 468,993, 475,925, and 488,761 are referred to.
Patent GB-812250-A (GB)
Title: Photoflash lamp
IPC: F21K5/08
Filed: 1957-08-02
Abstract: 812,250. Ignition of photoflash lamps. UNION CARBIDE CORPORATION. Aug. 2, 1957 [Aug. 6, 1956], No. 24556/57. Class 9 (2) A photoflash lamp for ignition by high frequency discharge comprises a sealed bulb 10 of glass or other transparent material containing actinic material such as aluminium foil or shavings and a pick-up coil 14 connected to a filament 16 coated with priming material. To flash the lamp a pulse circuit comprising a push-pull oscillator 18 may be used in which oscillations are developed in a primary winding 20 by shifts of potential in plates 24, 26 and grids 28, 30 in tubes 32, 34 respectively. A tuning capacitance 22 is placed in parallel with the winding 20 and a capacitance 36 connects grid 30 to one side of plate 24, while plate 26 is coupled to grid 28 by a capacitance 38. The cathodes 40, 42 of tubes 32, 34 respectively are connected to a low voltage direct current supply 44 by a switch 54 and a direct current supply 46 of higher voltage is connected to the mid-point of winding 20. The grids 28, 30 are earthed through resistances 48, 50 respectively and the junction of the tube filaments 40, 42 is earthed through a resistance 52. The circuit 18 is closed by means of a switch 53 after switch 54 is closed. In a modification, the pulse-producing circuit comprises one or more condensers connected through a high resistance to a direct current source. A primary winding having an iron core, preferably of open type, is connected to the terminals of the condenser the secondary winding 14 as before being enclosed in the bulb 10.
Patent GB-485081-A (GB)
Title: Improvements relating to portable respiratory apparatus
IPC: A62B7/02
Filed: 1936-09-09
Abstract: 485,081. Respiratory appliances ; pipe joints. COMMEINHES, R. Sept. 9, 1936, Nos. 24604 and 24605. Convention dates, Sept. 9, 1935 and Dec. 21, 1935. [Class 81 (ii)] [Also in Group XXVIII] In a portable respiratory appliance of the kind in which air or other respiratory gas stored under high pressure in bottles is supplied to a flexible expansion bag from which it is utilized on the open circuit principle by means of a mask having an exhaust valve, two interchangeable bottles 2 are mounted on a support 1 which also carries the bag, and mechanism for controlling the supply of gas to the bag through a dual coupling connected to each of the bottles, non-return valves being provided in each circuit to prevent one bottle emptying into the other or into the atmosphere. Each of the bottles is arranged vertically with its outlet at the bottom and opening sideways, and is secured at the top by a collar 3 or equivalent device and at the bottom by a spring attachment device 4 adapted to permit lateral displacement of the lower end of the bottle when the coupling to the expansion bag is loosened. Extensions 18 form guides for the bottles. The bottles and support are preferably made of light metal or alloy. The bottles may be strengthened by a wrapping of wire under tension. Each bottle is fitted with a hand-operated valve 5 which is connected through a member 17, provided with non-return valves corresponding to each bottle, to an expansion device 6 which communicates with respiratory bag 8 connected to the mask by pipe 9. A pallet 10 in contact with bag 8 is adapted to oscillate in response to the inflation or deflation of the bag, and controls through a needle valve the supply of gas to the expansion device 6. The valve 5 of each bottle is provided with a member 13, Fig. 4, into which is pressed the end of the tube 7 by the interengagement of a knurled wheel 15 and a collar 16 on the tube 7. In another form of coupling device, Fig. 5, a nozzle 22 screwed into the bottle is formed with a double conical head 24, the connecting tube 26 being pressed against a plug 31 by a wheel member 25. The latter is formed with an internal groove 28 containing a toroidal spring 29, which, when the wheel member is pressed against the head 24, first expands and then contracts, thus maintaining the wheel member and nozzle in centred alignment. A coned joint surface 30 on the screwed central projection 27 of the wheel member facilitates this centring action. The support 1 may be fitted with shoulder straps, and a cover for the whole apparatus or for the main elements may be provided. The collars 3 or equivalent devices may be movable and adjustable so as to permit of the use of bottles of different types. Reference has been directed by the Comptroller to Specification 26106/10, [Class 81 (ii)].
Patent GB-532361-A (GB)
Title: Improvements in gauges for measuring and checking dimensions and forms
IPC: G01B5/08
Filed: 1939-08-28
Abstract: 532,361. Gauging apparatus. JOHANSSON, Ltd., C. E., HELLBERG, H., HELBERG, C. L., and HAYCOCK, H. J. Aug. 28, 1939, No. 24627. [Class 106 (ii)] Relates to gauges of the retractable type in which a plurality of gauging elements are arranged to have movement radially of a common axis either by means of a rotatable cam or of an axially movable member and 'consists in a construction in which the cam or member is so formed that the gauging elements are moved into one definite pre-determined gauging position and are rigidly supported in that position. The hollow cylindrical gauge body 2 has a number of radial slots 3 and a tubular extension 4. Gauging elements 5 slide in the slots operated by a cam 6 on a rotary spindle 7 housed in the part 4. Normally the elements 5 are retracted within the body by springs 9. The cam 6 has a similar profile for each element and may be uni-directional or arranged to move the elements when rotated in either direction. The springs 9 are accommodated in a deep annular groove 12 in the cam. The latter has a concentric portion for supporting the elements rigidly in gauging position. In an alternative construction the elements 5 have radial slots through which pass pins fixed in the body part springs acting against the pins and the inner ends of the slots to keep the elements normally retracted. They are pushed outward by sliding a spindle corresponding to 7 having a cam engaging the elements 5. A further form shows an internal gauge in which a ring having cams formed on the inner surface to push in the elements carried by an inner ring against spring action. A further form does this by sliding the outer ring axially.
Patent GB-500596-A (GB)
Title: Improvements in and relating to methods of electric remote control of searchlights
IPC: F41G5/08
Filed: 1937-09-10
Abstract: 500,596. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 10, 1937, No. 24737. Convention date, Sept. 11, 1936. [Class 40 (i)] In a system for con trolling a searchlight 3 in accordance witl the movements of e sound locator 1, coarse and fine transmitters 5, 6 operated in accordance with the move ments as corrected in an evaluating equipment 4, control indicators 7, 8 and also a receiver 10 which operates a transmitter 12 for controlling the motors 13, 14 of the telescope 2 and searchlight 3. The transmitter 12 comprises contacts 20, Fig. 3, operated through differential mechanism 11 by the receiver 10 and adapted when displaced to co-operate with an oscillated contact 22 to generate in the field windings of the motor, impulses the duration of which depends on the displacement. The motors are thus driven until the contact 20 is restored by the shaft 19 driven by the motor 13. The motors may be controlled alternatively by a manuallyoperated follow-up switch which may be connected to the motors by the change-over switch 16. The motors 13, 14 are geared to interconnected motors 17, 18 of the selsyn type which maintain the motors 13, 14 in synchronism. The receiver 10 may be dispensed with, the switch 12 being operated directly by the receiver 8.
Patent GB-1011890-A (GB)
Title: Improvements in and relating to trimming for the eaves of buildings
Inventor: ROBINSON KENNETH WILLIAM
IPC: E04D13/15
Filed: 1963-06-20
Abstract: 1,011,890. Eaves trimming strip. PITCHMASTIC ASPHALT PAVING CO. Ltd. June 20, 1963 [June 28, 1962], No. 24797/62. Heading E1V. A trimming for the eaves of buildings comprises a metallic strip which includes a front vertical portion 10 having projecting top and bottom edges 10b, 10c and one or more integral portions 11, 12, 13 extending rearwardly, and a non metallic sheath 20 being formed along its top and bottom edges to engage with and fit upon said edges 10b, 10c, the front of the metallic strip being covered by the non-metallic sheath 20. The sheath may be made of plastics. Specification 856,852 is referred to.
Patent GB-1166985-A (GB)
Title: Fastener
IPC: B65D33/16
Filed: 1968-05-24
Abstract: 1,166,985. Clips. RHEIM INTERNATIONAL Inc. 24 May, 1968 [29 May, l967], No. 24806/68. Heading E2B. A fastener 1.0 comprises a generally U- shaped member the legs 11, 12 of which are deformable towards each other into encircling relation with an article C such as the mouth of a flexible container, the fastener being formed of wire of generally uniform cross-section providing one. substantially flat inner side 20 and a pair of opposite sides 21, 22 converging outwardly from the flat side 20. The cross section of the wire may be trapezoidal, Figs. 3 and 4 (not shown), in which the inner side is grooved.
Patent GB-493893-A (GB)
Title: Improved construction of reservoirs for the storage of hydrocarbons
IPC: B65D88/76
Filed: 1937-09-11
Abstract: A coating-composition used for forming a plastic layer between the inner and outer masonry or concrete structures of a buried reservoir consists of an emulsion of asphalt, bitumen or tar, linseed or other oil, pitch, powdered asbestos and talc or other filler materials, and benzole or other volatile solvent.
Patent GB-1514931-A (GB)
Title: Citronellene lactones and their use in perfumery
IPC: C07D315/00
Filed: 1974-06-05
Abstract: 1514931 Perfume compositions BUSH BOAKE ALLEN Ltd 5 June 1975 [5 June 1974] 24971/74 Heading A5B [Also in Division C2] Perfume compositions comprise the compounds where R is C 1-4  alkyl, together with convention perfumory ingredients:
Patent GB-322510-A (GB)
Title: Improvements in or relating to automatic electrical voltage or current regulators
IPC: H02P9/18
Filed: 1928-09-03
Abstract: 322,510. General Electric Co., Ltd., and Hopewell, F. Sept. 3, 1928. Regulation, automatic. - A current or voltage regulator, for example a regulator included in the field circuit of a dynamo to control its voltages, comprises a resistance the effective valve of which is determined by the relative positions of two step-by-step switches movable only in one direction. The resistance elements are connected in a closed circuit as in Fig. 1 and the effective value is altered by varying the angle between two contact members A, B. To ensure equal variations for equal relative movements each contact member, Fig. 2, may comprise two brush elements A<1>, A<2>, and B<1>, B<2> rigidly coupled together. The contact member may be driven by an electromagnetic pawl and ratchet mechanism with provision for a predetermined time interval between steps. Fig. 3 shows an automatic system for regulating the voltage of a generator G by a field resistance regulator R in which regulation cannot occur until an abnormal voltage has persisted for a given time and in which a warning signal is given if the voltage varies to an extent greater than that which the regulator can compensate. Double ended contact arms A<1>, B', A<2>, B<2> co-operate with contacts and resistance elements forming the equivalent of the arrangement shown in Fig. 2. The arms A', A<2> are driven by an electromagnet A' and the arms B<1>, B<2> by an electromagnet B<4> under the control of a contact voltmeter V, responsive to generator volts, and a series of slowrelease relays A - - D and relays H, L. According as volts are high or low, relay H or L is energized. Relay L by contact 3 energizes relay A through contact 14 on relay F and contact 10 on relay D. Relays B, 0 and D are energized in sequence, the last de-energizing relay A. The relays A, B, C drop their contacts in sequence, each at the end of its slow-release period; when contact 8 of relay C falls magnet AS is energized through contacts 7, 8, when contact 7 of relay D falls magnet AS de-energizes and the arms A', A<2> are moved one step in a direction to decrease the value of the resistance R. A similar operation takes place on high volts but the magnet B<5> is rendered operative by contacts 9 - - 12. Arms A<3>, A<4>, and B<3>, B<4> are driven in step with arms A<1>, A' and B<1>, B<2> respectively and co-operate with contacts connected as shown which energize relays E or F when the minimum and maximum values respectively of the resistance R have been attained; these relays interrupt the circuit of the appropriate magnet A<5>, B<5>and close the circuit of one or other of the warning devices 13, 15.
Patent GB-661841-A (GB)
Title: Method and device for the threading-in of a continuously supplied thread on a spindle of a ring twisting machine
IPC: D01H1/40
Filed: 1949-09-30
Abstract: 661,841. Spinning and twisting yarns. NAAMLOOZE VENNOOTSCHAP ONDERZOEKINGSINSTITUUT RESEARCH. Sept. 30, 1949 [Nov. 17, 1948], No. 25255/49. Class 120(ii). In an arrangement for initially attaching a yarn to the bobbin mounted on the spindle of a ring spinning machine, the yarn 27 is threaded through guides 4, 5, 25 to a waste take-up roller 16 which may be of the slip roller type for maintaining a tension of the yarn. With the yarn in this position, the spindle 3 is stopped and the yarn engaged with the traveller 29 which is then moved round the ring by hand so that the yarn is looped round the stationary spindle 3. A hollow bobbin 33 is then placed over the spindle and its lower end grips the yarn looped round the spindle between itself and an enlarged portion 32' at the lower end of the spindle 3. At the same time the yarn between the guides 4, 5 is pulled by the operator to maintain the tension of the yarn and the spindle with the bobbin is then caused to rotate taking up the slack between the guides 4, 5 and operating the traveller 29. Specifications 293,371, [Class 120(ii)], 343,791, 343,817 and 422,374 are referred to.
Patent GB-1535904-A (GB)
Title: Manipulator for industrial purposes
IPC: B25J9/00
Filed: 1977-06-16
Abstract: 1535904 Manipulators YACHIYO KOGYO KENKYUSHO KK 16 June 1977 [18 June 1976] 25255/77 Heading B8H A manipulator, shown in its starting position, has an auxiliary shaft 5 with an upper part 5a slidable in a main shaft 4 mounted for rotation and axially located in a housing 1. The upper and lower parts 5a, 5b of the auxiliary shaft 5 have opposed cam surfaces 27, 28, shown in developed form in Fig. 3. When main electrical power is switched on a reversible electric motor 30 drives an intermittent gear 36 counterclockwise through worm gearing 34, 31. When gear section 36a rotates gear 44 the lower auxiliary shaft part 5b is rotated by gears 42, 43, 41 so that the upper part 5a is lowered a distance h under the action of the weight of arm 8 and compressed spring 72. Further rotation of the gear 36 causes section 366 to rotate gear 40 and thus stub shaft 25 through gears 38, 39, 37. This rotates control shaft 21 so that eccentric pin 23 engaged in groove 20 of rod 19 shifts the rod 19 and associated operating shaft 15 to the left, causing fingers 12 to grip a work-piece 14. Further rotation of the gear 36 causes gear section 36c to rotate the gear 44 and so lift auxiliary shaft part 5a and the attached arm 8 through the action of the cam surfaces 27, 28. At the completion of the above three operating steps end 52a of arcuate groove 52 in worm gear 35 contacts key 53 of the main shaft 4 in consequence of which the main shaft 4 and the auxiliary shaft which is keyed thereto rotate counter-clockwise, the arm 8 partaking of this motion and carrying the work-piece 14 with it. At the required angular position of the arm 8 a switch 68 is operated to reverse the electric motor 30. This causes the arm 8 to be lowered, the work-piece 14 to be released, and the arm 8 to be raised and rotated back to the starting position where actuation of a switch (69), Fig. 2 (not shown), again reverses the electric motor to initiate another cycle of operation. Fig. 10 (not shown) illustrates an electrical control circuit for the motor 30.
Patent GB-297418-A (GB)
IPC: B65D25/14
Filed: 1928-09-03
Abstract: 297,418. Du Pont de Nemours & Co., E. I., (Assignees of Hopkins, H. H.). Sept. 21, 1927, [Convention date]. Linings, coatings, and coverings.-Sheet iron or other metal used in the construction of cans or like containers for food is coated with a lacquer of a synthetic resin composition, the coating being applied either to the sheets from which the cans are constructed or to the finished cans. The synthetic resin preferred are those obtained by reacting a mixture of a polyhydric alcohol, a polybasic acid, and a drying oil acid with or without other acidic bodies, substantially in the absence of air, a suitable one being prepared by heating a mixture comprising 92 parts by weight of glycerol, 148 parts of phthalic anhydride, and 298 parts of the acid obtained by the hydrolysis of linseed oil gradually to 220‹ C. in an atmosphere of CO2 or other inert gas. The alcohol ingredient of the resin may be glycerin, pentaerythrite, mannitol, one of the glycols or the polyglycerols, or any of the polyhydric alcohols. The polybasic acid may be any one of the phthalic, succinic, malic, maleic, fumaric, tartaric, citric acids or their anhydrides. The drying oil acid may be obtained also from perilla, soya bean, chinawood, fish, or the like oil. A natural resin acid may be added. The lacquer consists of a solution of the resin in any suitable organic solvent, a specimen composition being 35 parts by weight of the resin, 15 of butyl alcohol, 50 of solvent naphtha, and 1 of a drier if desired. Any suitable pigment may be added. The metal is baked for a short time after coating. Specifications 252,394, 284,349 and 289,794, [all in Class 2 (iii), Dyes &c.], are referred to.
Patent GB-914021-A (GB)
Title: Improvements in or relating to semi-conductor devices
IPC: H01L29/73
Filed: 1959-07-23
Abstract: 914,021. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 23, 1959 [July 26, 1958], No. 25321/59. Drawings to Specification. Class 37. A semi-conductor device is made by applying to both faces of a wafer of one conductivity type activators characteristic of the opposite conductivity type, removing the activator from at least part of one of the faces and then diffusing the activator into the wafer to form zones of said opposite type. In one embodiment an N-type silicon wafer is provided with an overall coating of boron by heating at 800‹ C. in boron trichloride and hydrogen. Alternatively a higher temperature is used in which case the boron partially diffuses into the surface. The boron is next etched away to expose the edges and strips on both faces of one or both ends of the wafer and the wafer heated to 1250‹ C. to produce two P-type zones therein. Subsequently ohmic contacts are made to these zones and to the exposed strip or strips to form a three or four electrode transistor. In alternative embodiments a circular wafer is used and the boron coating removed from peripheral annular zones on both faces and/or from a central zone on one face, prior to diffusion. Ohmic contacts are subsequently made to one of the annular zones, and/or to the central zone, and to the two P- type zones.
Patent GB-781399-A (GB)
Title: Fruit preparation machine
IPC: A23N4/14
Filed: 1955-09-05
Abstract: 781,399. Peeling pears &c. FOOD MACHINERY & CHEMICAL CORPORATION. Sept. 5, 1955 [Oct. 13, 1954], No. 25391/55. Class 28 (2). Fruit, such as a pear 16 is peeled by pushing it against a floating cutter 75, 76 which cuts off a strip from end to end. The pear is then axially turned round to cut off an adjacent strip at the next cutter and so on through a succession of cutters. The cutter 76 is mounted on the framing of a concave guide roller 61 which rests on the pear and so determines the thickness of the peel. The pear is handpushed on an impaling tube 19 of a carriage 15 and rests in a pivoted cup 15. A number of such carriages are provided and are pushed along rails by upstanding pushers 39 of endless chains 37, Fig. 3. The impaling tube is indexed round step by step by a circular rack 95, Fig. 10, engaging a concave pinion 86 on the tube 19, the rack being manipulated by a fixed cam on the rails, along which the carriage is pushed. As each pear approaches a cutter unit 21, Fig. 6, the follower shoe 131 contacts the guide track 128 so that the cutter unit is first raised until the shoe rides along the guide surface 135, when the guide roller 61 and cutting edge 76 engage the pear and cuts off a longitudinal slice of peel. Towards the end of this cut, roller 120, Fig. 9, contacts cam 124 to raise the cup 20 so that the cutter 76 cuts the round end of the pear. The rack rod 94 then contacts the portion 104 of cams 100-101 to shift it laterally, thus rotating the rack pinion 86 one step to rotate the pear. Just before this rotation the pear is lifted clear of its cup 21 by a cam 115, Fig. 3, moving an arm 113.
Patent GB-1429872-A (GB)
Title: Refrigerating system
IPC: F16K31/68
Filed: 1973-05-29
Abstract: 1429872 Refrigerating BORG-WARNER CORP 29 May 1973 [7 July 1972] 25392/73 Heading F4H A refrigerating system comprises a compressor 10, a condenser 12, a constant pressure expansion device 14, an evaporator 16 with a fan 17 for blowing air into a space to be cooled and a superheat regulating valve 25. The valve 25 maintains a predetermined superheat of refrigerant flowing to the compressor. Means are provided for establishing a control signal which is a function of the temperature of air within the controlled space and for applying the signal to the device 14. As shown, the means comprises a thermal bulb 52 and a capillary 50. In use, for bringing down the temperature of a vehicle standing in the sun, diaphragm 40 will be pushed downwards allowing a high evaporator pressure and consequently a relatively quick drop in the car temperature. As the car reaches a normal temperature, the bulb pressure falls until a predetermined control point is reached and the evaporator pressure is at a point slightly above the temperature at which freezing may occur on the evaporator coils.